Industrial Temperature measurements are usually using Thermocouples, RTD or other Resistance sensors. Some applications a 2-wire transmitter may be used, particularly if distances between the sensor and the instrumentation are large.
The following instruments can measure thermocouples and RTD directly or power and measure 2-wire transmitters:
All the products listed above have the following as standard or can be fitted as an option:
Using the user calibration feature, the Tracker and sensor can be match calibrated together where the instrument measures and stores the sensors signal at two known temperatures. This greatly reduces errors due to sensor output variations. The displayed values can be in °C or °F (and Kelvin on the 220 and 300 series).
All Tracker temperature measuring instruments have an automatic Cold Junction Compensation (CJC). On the Tracker 220 series the user can also select an external reference junction temperature and select up- or down-scale sensor break detection. In applications where non-linearising temperature transmitters are used, the Tracker 220 series can linearise a 4-20 mA signal to the required thermocouple curve. Tracker 300 Temperature Controller / TransmitterThe Tracker 300 series can be used for temperature transmitter or used as a fully featured temperature PID controller - or both! The Tracker 300 series of fully featured DIN rail mounted PID controllers, primarily designed for modern "HMI / SCADA" supervised control systems but still retaining the systems single loop integrity.
The Tracker 331 and Tracker 332 PID temperature controllers enable you to plan for more effective maintenance by monitoring thermocouple ageing and the health of electrical loads. The Tracker 300 series can be configured to send an alarm if the thermocouple shows signs of deterioration and needs replacing before it fails in service.
Checks are also made for partial electrical load failure or other heater problems such as SSR faults, shorts and open circuits. |